Fourth-Generation Honda Prelude Stealth Subwoofer Enclosure
Build a stealth subwoofer enclosure for the fourth-generation Prelude trunk that matches driver volume and stays rattle-free.
Adapted from Icelord
A stealth sub uses existing Prelude BB trunk cavities so the cargo area still looks factory while adding bass. Good results come from correct net volume and rigid, sealed construction - not from cramming the largest woofer into the spare well.
Design Inputs
| Input | Why |
|---|---|
| Driver parameters (Fs, Vas, Qts) | Sealed vs ported and liters required |
| Cavity map | Side pocket, false floor, or spare area |
| Amplifier power | Wire gauge, fuse, thermal load |
| Factory brace points | Safe mounting without crushing sheet metal |
Construction
- Cardboard-template the cavity before cutting wood.
- Use stiff plywood or MDF; brace large panels.
- Glue and screw every joint; seal air leaks with glue fillets or silicone.
- Provide a service hatch for the driver.
- Carpet visible faces to match the trunk.
Electrical
- Fused power at the battery
- Short ground to bare metal
- RCAs routed away from ECU and fuel-pump noise sources
- Grommets at every bulkhead pass-through
Validation
- Impedance check before power-up
- No buzzes over rough roads
- Gains set without audible distortion
- Terminals rechecked after a week
If the box volume is wrong, no amount of EQ will make it sound right - fix the enclosure first.
Applies to
1 taxonomy linkHonda
1 linkCredits and source
Source Adapted from Honda Prelude Generation IV stealth subwoofer on Icelord. Licensed under All rights reserved.